An X-ray diffraction study of Ni(aq)2+and Mg(aq)2+by difference methods

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Abstract
Difference methods of X-ray diffraction have been used to study the microscopic structure around Ni(aq)2+ and Mg(aq)2+ in a variety of aqueous solutions. Reference to the results of neutron diffraction experiments has shown that Ni(aq)2+ and Mg(aq)2+ can be regarded as structurally isomorphic species, thereby enabling the local ionic structure to be measured in terms of the cation-oxygen and cation-cation radial pair distribution functions, gMO(r) and gMM(r). Results are included for the dependence of these functions on concentration, counter-ion species and the interchange of light and heavy water as the solvent.